Thank you luoy, but I think it isn't a compatibility problem with my theme.
As you can see in the front page, the pagination links doesn't works: http://psnow.es
But however, in the archive pages, the pagination works fine with the theme function: http://psnow.es/noticias/
The home page it's generated in the php file that I mentioned in first post of this thread. It shows the last entries of all the posts types.
Can you please help me?